The document discusses different kings mentioned in "The Saga of King Hrolf Kraki", including King Frodi, King Hegi, and King Hrolf Kraki. King Frodi achieved his leadership through lineage but was a jealous and cold-hearted ruler who burned and destroyed parts of Denmark. King Hegi came to power by being elected based on his skills and popularity. King Hrolf Kraki faced many challenges as king but was praised for his courage, strength and fairness as a leader.